I have a Creative X-Fi sound card, 5.1 surround sound speakers. Everything was working fine and dandy for a long time. Now, the volume is in and out from low to high every minute or so. It is at normal volume and it just sounds like someone puts the volume up a bit, and then lowers it alot, and its all over the place. This happens in everything from music to games, does anyone have any idea what this is? All help is appreciated, thanks so much!